740978 has 12 divisors (see below), whose sum is σ = 1293102. Its totient is φ = 317520.

The previous prime is 740969. The next prime is 740989. The reversal of 740978 is 879047.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 47089 = 833^2 + 217^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

740978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3683 + ... + 3878.

2⁷⁴⁰⁹⁷⁸ is an apocalyptic number.

740978 is a deficient number, since it is larger than the sum of its proper divisors (552124).

740978 is a wasteful number, since it uses less digits than its factorization.

740978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577 (or 7570 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 740978 is about 860.8007899625. The cubic root of 740978 is about 90.4902464993.

The spelling of 740978 in words is "seven hundred forty thousand, nine hundred seventy-eight".